From my PoV, it's certainly a license that's preferable to that of BSD or MIT. There's a solid reasoning behind this HERE.
After all, even Tanenbaum himself was surprised to discover that MINIX is the most ubiquitous of all operating systems:
> "I guess that makes MINIX the most widely used computer operating system in the world, even more than Windows, Linux, or MacOS."
The SSPL being akin to that of the AGPL avoids that sort of dreadful situation, ensuring protections for the end users that not even the GPL affords them where #SaaS is concerned ;)
tallship